3 years ago

State the law of conservation of energy in your own words

Physics

1 answer:

tigry1 [53]3 years ago

7 0

Energy cannot be created or destroyed but it can be transfered from one form to another.

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The loudness of a sound is determined by the __________, or height, of the sound wave.

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Answer:10842.33m/s

Explanation:

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A 10000 N net force is accelerating a car at a rate if 5.5 m/s^2. What is the cars’s mass?

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An airplane accelerates from a speed of 88m/s to a speed of 132 m/s during a 15 second time interval. How far did the airplane t

Gelneren [198K]

Answer:

$1650\:\mathrm{m}$

Explanation:

We can use the following kinematics equations to solve this problem:

$v_f=v_i+at,\\{v_f}^2={v_i}^2+2a\Delta x$ .

Using the first one to solve for acceleration:

$132=88+a(15),\\15a=44,\\a=\frac{44}{15}=2.9\bar{3}\:\mathrm{m/s^2}$ .

Now we can use the second equation to solve for the distance travelled by the airplane:

$132^2=88^2+2\cdot2.9\bar{3}\cdot \Delta x,\\\Delta x= \frac{9680}{2\cdot2.9\bar{3}},\\\Delta x =\fbox{$ 1650\:\mathrm{m}$}$ (three significant figures).

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